Screen for centrifugal machines



H. L. JORGENSEN.-

SCREEN FOR CENTRIFUGAL MACHINES.

APPLICATION FILED JULY 28.1919.

1,333,71 9, Patented Mar. 16, 1920.

. w I b g w W LE " Hairs L. aonennsnn, or cmcaeo, ILLINOIS, Assreivoit T HARRINGTON AND KING PE FonATme COMPANY, orciricAeo; ILLINQIS,-A CORPORATION or ILLI- ors.)

"T all whom itmay concern; a I

Be itknown that 1,.HANS L. JORGENSELN,

I a citizen of theUnited States, and a resident Y or screen of acentrifugal machine audits;

of the city of Chicago, inthe' county of Cook and State of Illinois, have invented certain new andl'useful Improvements in- Screens for Centrifugal Machines, of which the following isa specification, reference be- 2 ing had to the accompanying drawings, forming a part thereof.

This. invention relates to the basket lining purpose is to providesa'tisfactory means for fasteningv together the ends of the perforated sheet or screen which formsthe peripheral wall of the basket. It consists in the features and elements of construction and their combinations hereinafter de! scribed, and shown in the drawings, as indi I cated by the claims.

In the drawings-z- V r Figure 1 is an elevation of apart of :a perforated sheet; embodying this invention and shown-before being bent into-cylindrical form for use as a lining for the'bask'et of a I centrifugal machine.

Fig. 2 is an elevation partly in section, showing certain parts of. thebasket of a centrifugal machine together with. a perfow rated sheet embodying th1s invention, :po .SIt'IOHQCl therein to form a lining and extending circumferentially in the basket with its ends overlapped and connected together.

-. Fig. 3 is a fragmentary elevation,on .a

much larger scale, of the joint .or'connection between the. overlapping ends of. the pen 'foratedsheets shown in F g. 2.

Fig. 6 is a detail section taken as indicated at line 66 on Fig. 3.

The centrifugal machines in which the perforated linings or screens embodying this invention are employed are prmcipally. used in: the process of refining sugar and it is common practice to cut. the screen or perforated sheet used for this purpose of sufii-' 'cient length so that when bent into cylindrical form and inserted in the basket or frame seen at A in Fig. 2, the two ends ofthe sheet will overlap each other though left scannn ron cnnrnrrneei. MACHINES.

sp cification of Letters Patent. Patented Mar. 16, 1920., Application filed July 28, 1919. Serial No. 313,801. i

tent at least. WVithout any further fastenlng between the ov'erlappedends, however, there is a tendency for the sugar to accumulate in the crack between saidoverlapped.

operation of the plow used for discharging or scraping, away the sugar from the inside of. the basket. The present invention provides means for fastening togetherthe overlapped ends so that the inner end shall lie practically fiat upon the outer end of the screen, and for this purpose the perforated sheet, 1, which ispreferably made of sheet metal and is uniformly perforated over its entire area" as conventionally.indicated at 2, iii the ,drawlngs, 15 formed at 1, which dese, ignates the area-near one end of the sheet,

with" a series of circumferentially': elongated apertures, .13, while the other end,.1", has a corrcspondingiseries of lugs, 1, struck up in pairs from the area of the sheet. The two lugs, 4, of each pair project transversely of the, length of the sheet, that is, transcircumferentially when the-sheet'is considered free toexpand or slip upon each other in circumferential direction -to a limlted ex;

asbent into cylindrical form as shown in Fig; 2, and the free ends offthe two lugs stand adJacent' to each other as they are initially formed, but both lugs of the pair are bent toproject transversely of the plane of thesheet for insertion into and extension through the corresponding one of the apertures, 3, said lugs;be1ng bent so; that they arespaced apart by, substantially the width of the aperture, 3, and engage its opposite lateral edges. 7

5th the end, 1, of the sheet, 1, thus lapped over the end, 1, as; shown in Fig.

Band with a pair ofythe lugs, l, projecting through each aperture, 3, there is applied over the joint thus formed a holding memher, 5, having the slots, 6, 6, arranged in pairs to register with the respective pairs of lugs, 4:, and receive, the same, the lugs being clenched down over the plate asindicated'in Fig. 3. Between each pair of slots,

6, 6, the material of-the holding member, 5, may be depressed or offset as shown at 7 to lie substantially in the plane of the aperture, 3, so that if the holding member is of the same thickness as the lining, the total thickness of the ]O1I1t, when the. lugs, 4, are

clenched over onto this oft-set area, will not materially exceed three thicknesses of the sheet metal, and in any case it willbe minimized by this formation of the holding member, 5. The bending out of the 111g, 4:, leaves a substantially square Window or opening, 8, but this open area is entirely covered by the depressed area, 7, of the part, 1 5, so that in all the surface presented to the contents of the basket,'A, there is no opening larger than the regular perforations, 2, of

" the screen member, 1. 7

:Thus by the use of the clenching lugs,

. 4, andholding member, 5, the edge of the inner end, 1", of the sheet, 1, is held closely against the overlapped end, 1 preventing comprising a perforated sheet bent with one end lapped over the other, one ofsaid ends having clrcumierentially elongated apertures and the other end having lugs cut from the area of the-sheet, extending 7 through the respective apertures, the width of each lug being less than the length of its aperture to allow for circumferential play of the overlapped ends.

2. In a lining as defined in claim 1, said lugs being cut from thesheet in pairs, the lugs of each pair extending oppositely and toward each other in trans-circumferential directions with their free ends adjacent.

3. In a lining as defined in claim 1, an apertured holding member overlaid'against the apertured end of the sheet on the side opposite that which is lapped by the other end, each lug extending through an aperture of said member and being bent down thereon for securement.

4. In a lining as defined in claim 1, a

V holding member disposed against the apertured end of the sheet on the side opposite that which is lapped by the other end, the said lugs of the other end being cut from the I the jOiIlt;

sheet in pairs,'the lugs of each pair extending through corresponding,openings in the "holding member whichgare llkfiWlSB arranged in pairs and spaced apart. by substantially the width of an aperture'of the lining member, and the lugs being clenched down upon the holding member for secure ment;

,5. Ina lining, as defined in claim 1, a

holding member disposed against the apertured end of thesheetcnzthe' side opposite that which is lapped by the other end, the said lugs 01": the other end being cut from the sheetin: pairs, with those of each pair extending. through 1 corresponding slots in a the holding memberwhich are likewise arranged in pairs and spaced apart by substantially the width of an a-pertureof the lining member for securement, the area of the holding member betwee'n'each pair of its lug-receivingslots being off-set to:lie substantially inthe plane of an aperture of the lining member, and the lugs of each pair being clenched down on to such area with their ends extending toward each other-in trans-circumferential direction and adjacent each other, to minimize the thickness of L 6. In a; lining as defined in claim 1, the lugs being set baclrfrom the extreme end of the sheet by a distance not less than the length of one of the elongated apertures 'minus the width of a lug, to insure coverage otthe apertured areas throughout the range of playof one end upon the other.

ture of the holding member and being bent down thereon for securement, and said holding member having a perforated but otherwise unapertured area extending circumferentially beyond the lugs by a distance not less than the play of the overlapped ends of the lining. I V

In testimony whereof, I have hereunto set my hand at Chicago, Illinois, this 23 day of July, 1919. V

HANS L. JORGENSEN. 

